H2155-304: a highly luminous BL Lac object

Details H2155-304: a highly luminous BL Lac object H2155-304: a highly luminous BL Lac object

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.281..285c&link_type=abstract

Nature, Volume 281, Issue 5729, pp. 285-286 (1979).

Physics

17

Scientific paper

The radio source PKS2155-304 has recently been identified1 with a HEAO 1 X-ray source and a ~14 mag object that has a featureless spectrum and is interpreted as a member of the BL Lac class. We describe here our optical spectroscopy of this object which reveals two weak emission features at λ 5,820 and 5,870 Å. We suggest that these lines are [O III] λ 4,959, 5,007 redshifted by z = 0.17. This result supports the interpretation of H2155-304 as a highly luminous BL Lac object.

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